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On accuracy of current geopotential models estimated through comparison of quasi-geoid model and GPS/levelling data

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F06%3A00501390" target="_blank" >RIV/49777513:23520/06:00501390 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    On accuracy of current geopotential models estimated through comparison of quasi-geoid model and GPS/levelling data

  • Original language description

    Gravity-dedicated satellite missions CHAMP and GRACE provide accurate data that can be inverted into geopotential coefficients forming global geopotential models (GGM). Through an estimation process, mean square errors of these coefficients can be evaluated. In most cases, even the entire variance-covariance matrices are computed. However, these errors are only formal and do not represent well the actual accuracy of estimated coefficients, thus also of various gravity field parameters synthesized from these coefficients. For this reason, validation procedures for the new GGMs are being sought since the classical validation methods reached their limits. This article discusses the validation procedure of the GGM through its comparison with independent data estimated at selected GPS/levelling stations over the area of Central Europe.

  • Czech name

    O přesnosti současných modelů geopotenciálu určené porovnáním kvazigeoidu s GPS/nivelačními daty

  • Czech description

    Družicové mise CHAMP a GRACE poskytují přesná data, která mohou použita pro výpočet koeficientů globálního modelu geopotenciálu. Při jejich výpočtu je možno odhadnout jejich střední chyby či dokonce celou kovarianční matici. Tyto chyby mají ale formálnícharakter a nereprezentují dobře skutečnou přesnost těchto koeficientů. Proto jsou hledány nové možnosti ověření přesnosti s použitím GPS a nivelačních údajů v oblasti střední Evropy.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    DE - Earth magnetism, geodesy, geography

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2006

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Reports on Geodesy

  • ISSN

    0867-3179

  • e-ISSN

  • Volume of the periodical

    76

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    PL - POLAND

  • Number of pages

    7

  • Pages from-to

  • UT code for WoS article

  • EID of the result in the Scopus database